In recent publications Standard Afrikaans is still often seen as based on the historical variety Oosgrensafrikaans (Eastern Cape Frontier Afrikaans). However, the work of historical linguists such as Den Besten, Deumert and Roberge reveals a much more complex history. In this article the concept of Oosgrensafrikaans is analysed from historical and theoretical perspectives and shown to suffer from some serious defects.